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A kind of clean extraction method of colored molybdenum lead ore

A color molybdenum lead ore and extraction method technology, applied in the field of hydrometallurgy, can solve the problems of long bioleaching cycle and low molybdenum leaching rate, and achieve the effects of clean and environmentally friendly production process, good product quality, and high recovery rate throughout the process

Active Publication Date: 2015-08-12
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bioleaching cycle is long, and because Mo and Pb are toxic to most bacteria, the molybdenum leaching rate will be low

Method used

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  • A kind of clean extraction method of colored molybdenum lead ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] For molybdenite whose main components are Mo2.87%, Pb9.39%, Zn3.37%, Al3.11% and Fe7.05%, after crushing and grinding, it is leached with NaOH. Under the conditions of solid ratio 1:1, leaching time 1h, NaOH concentration 60g / L and stirring speed 300r / min, molybdenum and a part of lead enter into the alkaline leaching solution, the leaching rate of molybdenum reaches 99.7%, and the leaching rate of lead reaches 59%. The rest of the lead goes into the alkaline leaching residue.

[0043] The alkali immersion solution is further treated by sulfide precipitation-stage acidification. The conditions of sulfide precipitation are 95% of the theoretical amount of sodium hydrosulfide, temperature 75°C, and reaction time 30 minutes. After sulfide precipitation, it is filtered, and the filtrate is acidified in two stages with sulfuric acid. In the first stage, acid is added to adjust the pH of the solution to 6.0, and after filtration, the second stage of acidification is carried o...

Embodiment 2

[0047] For the molybdenite whose main components are Mo3.64%, Pb11.59%, Zn3.29%, Al2.81% and Fe6.84%, after crushing and grinding, it is leached with NaOH. Under the conditions of solid ratio of 2:1, leaching time of 0.5h, NaOH concentration of 70g / L and stirring speed of 400r / min, molybdenum and a part of lead enter the alkaline leaching solution, the leaching rate of molybdenum reaches 96.7%, and the leaching rate of lead reaches 52%. , and the rest of the lead enters the alkali leaching residue.

[0048] The alkali immersion solution is further treated by sulfidation precipitation-stage acidification. The sulfide precipitation conditions are 95% of the theoretical amount of sodium sulfide, temperature 75°C, and reaction time 30 minutes. After sulfide precipitation, it is filtered, and the filtrate is acidified in two stages with sulfuric acid. The pH of the solution is adjusted to 6.0 by adding acid in one stage, and the second stage of acidification is carried out after fi...

Embodiment 3

[0052] For molybdenite whose main components are Mo7.05%, Pb24.16%, Zn1.84%, Al0.4% and Fe13.52%, after crushing and grinding, it is leached with KOH. Under the conditions of solid ratio 3:1, leaching time 5h, KOH concentration 60g / L and stirring speed 400r / min, molybdenum and a part of lead enter into the alkali leaching solution, the leaching rate of molybdenum reaches 94.7%, and the leaching rate of lead reaches 29%. The rest of the lead goes into the alkaline leaching residue.

[0053] The alkali immersion solution is further treated by sulfidation precipitation-stage acidification. The sulfide precipitation conditions are 95% of the theoretical amount of sodium sulfide, temperature 75°C, and reaction time 30 minutes. After sulfide precipitation, it is filtered, and the filtrate is acidified in two stages with sulfuric acid. The pH of the solution is adjusted to 6.0 by adding acid in one stage, and the second stage of acidification is carried out after filtration, and the ...

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Abstract

The invention discloses a colored wulfenite cleaning and extracting method. According to the technical scheme, the method comprises the following steps: leaching colored wulfenite by using an alkali liquid, wherein molybdenum nearly completely enters lixivium, a part of lead enters the lixivium, and the other part of lead enters leaching slag; precipitating and recycling the lead in the lixivium when the lead is purified, leaching the lead in the leaching slag by using manganese dioxide in a hydrochloric acid system, and furthermore crystallizing and separating out to be recycled by using lead chloride at low temperature. By adopting the technique disclosed by the invention, the colored wulfenite which comprises 1-5% of molybdenum and 8-25% of lead can be directly treated, the recycling rates of molybdenum and lead are respectively greater than 85% and 95%, and a novel way is provided for efficient and comprehensive utilization of complex colored molybdenum associated raw ore resources which are hard to select in China.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a method for cleaning and extracting colored molybdenum lead ore. Background technique [0002] Molybdenum is a very important rare metal, widely used in metallurgy, chemical industry, military, electronics, biomedicine, agriculture, environmental protection and aerospace due to its excellent physical and chemical properties such as high strength, high melting point, abrasion resistance and corrosion resistance , has become an important raw material and an irreplaceable strategic material in the national economy. [0003] Colored molybdenum lead ore is one of the important ore sources for molybdenum production. It is often produced in the oxidation zone of lead-zinc deposits. Symbiosis of smithsonite, hemimorphite, limonite, duromanganite, and perspective stone. my country has rich reserves of colored molybdenum-lead ore resources, and such deposits have been found in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/34C22B13/00C22B3/12C22B3/44C22B3/26
Inventor 蒋开喜王海北汪胜东谢铿张磊蒋应平冯亚平黄胜魏帮赵磊王仍坚李贺刘巍
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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